研究报告
毛艳丽,康海彦,王现丽,牛云峰,郭一飞,陈松涛,王巷文.磁性炭微球表面印迹吸附材料的制备及其对氨苄西林识别与选择性吸附[J].环境科学学报,2016,36(7):2451-2459
磁性炭微球表面印迹吸附材料的制备及其对氨苄西林识别与选择性吸附
- Selective adsorption of ampicillin by molecularly imprinted polymers based on magnetic carbon microspheres
- 基金项目：国家自然科学基金（No.21406090）；中国博士后青年基金（No.2011M500870）；河南省高校科技创新人才支持计划（No.2012HASTTT026）；河南省教育厅青年骨干教师资助项目（No.2011GGJS-167）
- 作者
- 单位
- 毛艳丽
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 康海彦
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 王现丽
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 牛云峰
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 郭一飞
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 陈松涛
- 河南城建学院 市政与环境工程学院, 平顶山 467036
- 王巷文
- 华中科技大学 化学与化工学院, 武汉 430074
- 摘要：以核桃壳为原料，利用溶剂热法制备了磁性炭微球（MCMs），结合表面印迹技术制备了基于MCMs的磁性炭微球表面分子印迹材料（MMIPs）。通过FT-IR、TGA、VSM 和TEM等表征手段对其理化性能进行了表征，结果表明MMIPs为球形，印迹聚合层厚度50~80 nm，具有热稳定性和磁稳定性。采用吸附实验研究了MMIPs对AMP的识别与选择性吸附性能。Langmuir等温模型能较好地描述MMIPs对AMP的吸附平衡数据，25 ℃时MMIPs的单分子层最大吸附容量为40.96 mg·g-1。准二级动力学模型能较好的描述MMIPs对AMP吸附动力学行为。选择性分析结果表明，MMIPs对AMP具有较好地选择识别性，并且MMIPs 可以循环使用5次。结合高效液相色谱分析技术，MMIPs已成功应用于牛奶样品中痕量AMP的分离、富集和回收，AMP的回收率为92.78%。
- Abstract：Using the walnut husks as raw materials the magnetic carbon microspheres(MCMs)were firstly prepared via an effective polyol-medium solvothermal method, and then the MMIPs were further synthesized based on the MCMs. The as-prepared MMIPs were characterized by Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM), MMIPs were demonstrated bulbiform shape with an imprinted polymer film (thickness of about 50~80 nm), and exhibited thermal stability and magnetic property. Batch mode adsorption studies were carried out to investigate the adsorption equilibrium, kinetics and selective recognition. The Langmuir isotherm model was fitted to the equilibrium data better than the Freundlich model, and the monolayer adsorption capacity of MMIPs was 40.96 mg·g-1 at 25 ℃. The kinetic properties were well described by the pseudo-second-order model. The selective recognition experiments demonstrated selectivity of MMIIPs towards AMP over competitive antibiotic compounds. In addition, MMIPs could be reused for five times. Combined with high performance liquid chromatographic analysis technology, the MMIIPs as-prepared were successfully applied-to the selective solid phase extraction of AMP from milk samples with the recoveries of 92.78%.
- Key words：magnetic carbon microspheres magnetic molecularly imprinted particles ampicillin (AMP) specific adsorption
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